Abstract : As part of the Army's Modernization Program, Direct Digital Control (DDC) TNT production facilities were constructed at two Army Ammunition Plants (AAPs). The modernization program consists of two phases: Phase I was the construction of one DDC line at Volunteer AAP; Phase 2 was the construction of three DDC lines at Volunteer AAP and three at Joliet AAP. Volunteer is currently producing on their Phase 1 DDC line. The construction of the Phase 2 TNT lines was based on the same design specifications; however, since each plant had a different construction contractor, there are subtle design differences between plants. Concern over these differences led the Director of the Procurement and Production Directorate, HQ, ARMCOM, Rock Island, IL, to request a decision risk analysis to assess the risks associated with mobilization start-up of DDC TNT lines at Joliet and Volunteer AAPs with and without prior prove-out.